JPH1182200A - Intake device for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an air cleaner, a collector and a manifold in a compact state and to improve workability at the time of fitting by integrally forming the air cleaner, collector and manifold of two divided bodies. SOLUTION: An air cleaner bottom case 3, a collector bottom case 4 and manifold lower side divided bodies 5A, 5B are integrally formed into a lower molding 2. An air cleaner opening case 9, a collector upper case 10 and manifold upper divided bodies 11A, 11B are integrally formed into an upper molding 8. The manifold lower side divided body 5A is disposed in the air cleaner bottom case 3, and the manifold upper side divided body 11A is disposed in the air cleaner opening case 9. At the time of assembling an intake device 1, the lower molding 2 and upper molding 8 are jointed, and the air cleaner upper case 13 is fitted to the air cleaner opening case 9 along with the filter 17. A duct 21 and a throttle device 24 are connected between the air cleaner upper case 13 and the collector upper case 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake system for an internal combustion engine suitable for use in an intake system of, for example, an automobile engine.

[0002]

2. Description of the Related Art Generally, an internal combustion engine such as an automobile engine is provided with an intake device for sucking external intake air into a combustion chamber of the engine. This type of prior art engine intake device includes an air cleaner into which intake air flows, a collector connected to the air cleaner via a duct or the like, and a plurality of manifolds extending from the collector toward each cylinder of the engine. And so on.

In addition, this intake device is housed in an engine room of an automobile or the like together with an engine body, an air cleaner is attached to an inner wall portion of the engine room via a mounting bracket or the like, and a collector and a manifold are provided on the engine body side. Installed.

[0004] During operation of the engine, intake air from the outside flows into the collector via an air cleaner and a duct, and the intake air is taken into each cylinder of the engine from each collector via each manifold. .

When an intake device is installed in an engine room at the time of manufacturing an automobile or the like, a collector and a manifold are first attached to an engine body in the engine room.
After the air cleaner is mounted on the inner wall of the engine room by a mounting bracket or the like, the air cleaner and the collector are connected by a duct or the like.

On the other hand, as another prior art, there is also known an intake device for an engine in which an air cleaner, a collector, a manifold and the like are integrally formed of a resin material or the like (Japanese Patent Application Laid-Open No. 8-334070). .

[0007] In this case, each manifold is attached to the engine body, and an air cleaner, a collector and the like are arranged on the upper side of each manifold. Also,
The lower sides of the air cleaner and the collector are integrally formed on the upper surface of each manifold.

[0008]

In the prior art described above, the collector and the manifold are mounted on the engine body in the engine room, the air cleaner is mounted in the engine room, and the air cleaner and the collector are connected by a duct or the like. Configuration.

However, when the intake device is installed in the engine room, the work of installing the collector and the manifold and the work of installing the air cleaner must be performed separately. In spite of the fact that the inside of the engine room is narrowed by disposing the collector, the manifold, the air cleaner and the like, it is necessary to connect a duct between the air cleaner and the collector in the engine room.

For this reason, in the prior art, not only the work of mounting the intake device in the engine room is troublesome, but also the number of parts of the intake device increases because the air cleaner is mounted in the engine room using the mounting bracket or the like. In addition, there is a problem that it is difficult to reduce the size of the intake device.

In another conventional technique, an air cleaner,
Since a collector etc. is arranged on the upper side of the manifold,
The height of the intake device is increased, and the air cleaner and the like easily project upward from the engine body. For this reason, a relatively large space in the height direction is required in the engine room, and there is a problem that the layout of the intake device becomes difficult particularly in a vehicle type or the like in which the ground height of the engine room is low.

The present invention has been made in view of the above-described problems of the prior art, and the present invention can form an air cleaner, a collector, a manifold, and the like in a compact manner, and can efficiently perform the mounting work thereof, and can reduce the number of parts. It is an object of the present invention to provide an intake device for an internal combustion engine capable of reducing the number of components and improving the layout.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an invention according to claim 1 includes an air cleaner bottom case having an open upper side, a collector bottom case, and a plurality of manifold lower divisions extending from the collector bottom case. An integrally formed lower molded body, an air cleaner opening case joined to the opening side of the air cleaner bottom case, a collector upper case joined to the upper side of the collector bottom case, and a plurality joined to the upper side of each manifold lower divided body. And an upper air cleaner case which is detachably mounted on the upper side of the air cleaner opening case and covers the air cleaner opening case.

With this configuration, when assembling the air intake device, the lower molded body and the upper molded body are first joined to each other, and the upper air cleaner case is attached to the upper side of the air cleaner opening case, so that the air cleaner of the air intake device is assembled. , Collector and manifold can be integrally formed.

According to the second aspect of the present invention, the manifold lower divided body provided on the lower molded body is integrally formed with the air cleaner bottom case while passing through the air cleaner bottom case, and the manifold provided on the upper molded body. The upper split body is formed integrally with the air cleaner opening case while passing through the air cleaner opening case.

Accordingly, since the manifold is disposed so as to pass through the air cleaner between the air cleaner bottom case and the air cleaner opening case, the air cleaner is formed using the space around each manifold, and the air cleaner and the manifold are formed. Can be compactly and integrally formed.

According to the third aspect of the present invention, the manifold lower division provided on the lower molded body is provided so as to extend in a different direction from the collector bottom case, and the manifold lower division extending to one side is the air cleaner bottom case. The upper part of the manifold provided in the upper molded body is formed so as to extend in a different direction from the upper case of the collector, and the upper part of the manifold extending to one side is provided with the air cleaner opening. It is formed integrally with the air cleaner opening case while passing through the case.

Thus, for example, even when the cylinders of the internal combustion engine are arranged at positions separated from each other, the cylinders pass through the air cleaner through one of the manifolds extending from the collector of the intake device toward the cylinders of the internal combustion engine. The air cleaner and the manifold can be formed integrally in a compact manner.

Further, according to the present invention, the collector bottom case is disposed in the air cleaner bottom case, and the manifold lower divided body provided in the lower molded body is passed from the collector bottom case to the inside of the air cleaner bottom case. The collector upper case is disposed in the air cleaner opening case, and the manifold upper division body provided in the lower molded body is formed integrally with the air cleaner bottom case while passing through the air cleaner opening case from the collector upper case. And formed integrally with it.

Thus, the collector can be disposed in the air cleaner, the manifold can be extended from the collector to the outside via the air cleaner, and the air cleaner, the collector, and the manifold can be integrally formed in a compact manner.

According to the invention of claim 5, the upper molded body is provided with a throttle mounting portion for mounting a throttle device.

Thus, the throttle device is mounted on the throttle mounting portion of the upper molded body, for example, an air cleaner and a collector are connected via the throttle device, and the flow rate of the intake air flowing from the air cleaner to the collector is variably controlled. it can.

According to the invention of claim 6, a filter is detachably provided in the air cleaner opening case between the air cleaner upper case and the air cleaner upper case is provided in the duct and the upper molded body. And connected to the upper case via the collector.

This allows the intake air to flow from the air cleaner to the collector via the duct and the throttle device,
The flow rate can be variably controlled by a throttle device. Also, the filter can be replaced by attaching and detaching the upper air cleaner case to and from the air cleaner opening case.

Further, according to the present invention, a mounting portion for mounting the lower molded body to the main body side of the internal combustion engine, and an injection valve mounting hole for mounting a fuel injection valve are provided on the distal end side of the manifold lower divided body. Are provided.

Thus, the lower molded body and the upper molded body can be attached to the main body of the internal combustion engine by the attaching portion, and the work of attaching the air cleaner, the collector and the manifold can be performed simultaneously. Then, in this state, the fuel injection valve can be mounted in the injection valve mounting hole of the lower manifold body.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

FIGS. 1 to 4 show a first embodiment of the present invention. In this embodiment, an air intake device such as an automobile engine will be described as an example.

Reference numeral 1 denotes an intake device for an engine (not shown) installed in an engine room of an automobile or the like. The intake device 1 includes a lower molded body 2, an upper molded body 8, an air cleaner upper case 13, and the like, which will be described later. , Air cleaner 14,
The vehicle includes a collector 15, manifolds 16A and 16B, a throttle device 24, and the like.

Here, the intake device 1 is configured corresponding to, for example, a horizontally opposed four-cylinder engine or the like, and the manifolds 16A and 16B are provided at both ends of the engine body (neither is shown). 1 extends in the left and right directions in FIG.

Numeral 2 denotes a lower molded body constituting a lower side of the intake device 1. As shown in FIG. 4, the lower molded body 2 is made of, for example, an injection-molded resin material or the like, and has a substantially box-like shape with an open upper side. An air cleaner bottom case 3, a collector bottom case 4 having an open upper side, manifold lower divided bodies 5A and 5B also having an open upper side, and a flange portion 7 provided on a peripheral edge of these upper surfaces are integrally formed. .

FIGS. 5A and 5A show the structure of the collector bottom case 4 from FIG.
The two lower manifolds 5B, 5B extending leftward in the middle are the two lower manifolds also extending rightward from the collector bottom case 4 and each manifold lower part. The divided bodies 5A and 5B are, as shown in FIG.
A cross section is formed in a substantially arc shape from a part on the proximal end side to a part on the distal end side, and a substantially cylindrical shape is formed on the distal end side.

The lower manifold 5A, which extends to the left, is positioned such that the middle portion in the longitudinal direction passes through the inside of the air cleaner bottom case 3, and the left and right sides of the air cleaner bottom case 3
In addition to being formed integrally with the right side surface, the tip side protrudes from the air cleaner bottom case 3 and is bent downward toward the engine body.

Also, the manifold lower divided body 5A, 5B
As shown in FIGS. 1 and 4, injection valve mounting holes 5A1 and 5B1 for mounting an injection valve (not shown) for injecting fuel into the manifolds 16A and 16B are formed on the distal end side of the valve.

Further, the lower manifold body 5A, 5
B are integrally connected via mounting portions 6 for mounting the lower molded body 2 to the engine body side, and each mounting portion 6 has a plurality of bolt insertion holes 6A, 6A,. When,
Support parts 6B for a supply pipe (not shown) for supplying fuel to the injection valve are integrally formed.

Numeral 7 denotes a flange portion integrally formed on the upper end side of the lower molded body 2. The flange portion 7 has an air cleaner bottom case 3, a collector bottom case 4, and a manifold lower division as shown in FIGS. It is formed to protrude outward in the horizontal direction from the upper surface side of the bodies 5A, 5B and the like.

Numeral 8 denotes an upper molded body formed of a resin material or the like. As shown in FIG. 4, the upper molded body 8 has a substantially square air cleaner opening case 9 opened upward and downward.
A substantially box-shaped collector upper case 10 having an open lower side, and manifold upper split bodies 11A and 11B having an open lower side.
And a flange portion 12 provided on the periphery of these lower surfaces are integrally formed. And the collector upper case 10
As shown in FIG. 3, a substantially cylindrical throttle mounting portion 10A connected to the throttle device 24 is formed so as to protrude obliquely upward from the side surface portion.

Numerals 11A and 11A denote two manifold upper divisions extending leftward in FIG. 1 from the collector upper case 10, and 11B and 11B denote collector upper cases 10A and 11B.
The upper manifolds 11A and 11B each have a substantially arc-shaped cross section, as shown in FIGS. 1 to 3.

The manifold upper split body 11A extending to the left is opened when the middle portion in the longitudinal direction passes through the air cleaner opening case 9.
Are formed integrally with the left and right side surfaces of the air cleaner, and the front end protrudes from the air cleaner opening case 9 to the outside.

Numeral 12 denotes another flange portion integrally formed on the lower end side of the upper molded body 8 corresponding to the flange portion 7. As shown in FIGS. It is joined to the flange 7 of the lower molded body 2 by means such as welding.

Reference numeral 13 denotes a substantially box-shaped upper air cleaner case removably mounted on the upper side of the air cleaner opening case 9. The upper air cleaner case 13 covers the air cleaner opening case 9 as shown in FIG. I have.

Here, the upper molded body 8 is formed by
The lower molded body 2 is integrally fixed to the upper end side of the lower molded body 2 through the center 12. The air cleaner opening case 9 is joined to the opening side of the air cleaner bottom case 3, and these constitute an air cleaner 14 together with the air cleaner upper case 13.

The collector upper case 10 is joined to the upper part of the collector bottom case 4, and these are connected to the collector 15.
Is composed. Further, the manifold upper divided body 11
A, 11B are joined to the upper side of the manifold lower divided bodies 5A, 5B, and these are connected to the manifolds 16A, 16B.
Respectively.

Reference numeral 17 denotes a filter provided in the air cleaner 14. The filter 17 has an air cleaner opening case 9 and an air cleaner upper case 1 on the outer peripheral side as shown in FIG.
The air cleaner 14 is detachably mounted between the air cleaner 3 and the air cleaner 14 to define an inflow chamber 18 and an outflow chamber 19.

Reference numeral 20 denotes a substantially J-shaped outside air introduction pipe for introducing outside air into the inflow chamber 18 as intake air.
The air cleaner bottom member 3 and the air cleaner opening case 9 are made of different members, and are attached to the side surface of the air cleaner 14 by an adhesive means or the like.

Reference numeral 21 denotes a substantially L-shaped duct connecting the air cleaner 14 and the collector 15 side. As shown in FIG. 3, one end of the duct 21 is connected to the upper air cleaner case 13 via a mounting band 22. It communicates with the inside of the outflow chamber 19 of the air cleaner 14. The other end of the duct 21 is connected to a throttle device 24 via a mounting band 23.

Reference numeral 24 denotes a throttle device for increasing or decreasing the amount of intake air of the engine. As shown in FIGS. 1 and 3, the throttle device 24 includes a substantially cylindrical housing 24A, an accelerator pedal (not shown) of an automobile, and the like. And a valve body 24B that is opened and closed according to the operation amount of the valve and that changes the flow rate of the intake air flowing through the housing 24A. The housing 24A has an inflow side connected to the duct 21 using the mounting band 23, and an outflow side connected to the throttle mounting portion 10A of the upper collector case 10 by bolts 25.

As a result, in the intake device 1, the air cleaner 14 includes the duct 21, the throttle device 24, and the collector 15
The distal ends of the manifolds 16A, 16B are connected to the respective cylinders of the engine in a state of being connected to the manifolds 16A, 16B via the through holes, and are mounted on the engine body side by the mounting portions 6 of the lower molded body 2. Also, the air cleaner 14
Are integrally supported by each manifold 16A.

The intake device 1 for an automobile engine or the like according to the present embodiment has the above-described configuration, and the operation thereof will be described below.

First, during operation of the engine, the valve body 24B of the throttle device 24 is opened, so that the intake air from the outside flows through the outside air introduction pipe 20 as shown by the arrow A in FIG. Flows into the inflow chamber 18, is cleaned by the filter 17, and flows out to the outflow chamber 19 side. Then, as shown in FIG. 3, the intake air flows from the air cleaner 14 through the duct 21 and the throttle device 24 in the direction of arrow B, and flows into the collector 15.

Further, the intake air in the collector 15 flows through each manifold 16A on the one hand as shown by the arrow C, and on the other hand flows through each manifold 16B, and then the intake air flows into each cylinder of the engine. Inhaled. Fuel is injected into the intake air flowing through the manifolds 16A and 16B from the injection valves mounted in the injection valve mounting holes 5A1 and 5B1 of the lower manifolds 5A and 5B.

On the other hand, when assembling the air intake apparatus 1, first, the flange portion 7 of the lower molded body 2 and the flange portion 12 of the upper molded body 8 shown in FIG. It is attached to the upper side of the air cleaner opening case 9 together with the filter 17.

Subsequently, one end of the duct 21 shown in FIG. 1 is connected to the upper air cleaner case 13 by a mounting band 22, and the other end of the duct 21 is connected to the inflow side of the throttle device 24 by a mounting band 23. The outlet side of the throttle device 24 is connected to the throttle mounting portion 10A of the upper collector case 10 by each bolt 25. further,
The outside air introduction pipe 20 is attached to the side of the air cleaner 14.

When the air intake device 1 is installed in the engine room, the lower molded body 2, the upper molded body 8, the upper air cleaner case 13, and the like are assembled in the engine room and the mounting bolts are mounted. (Not shown) and the like are screwed to the engine body through the bolt insertion holes 6A of the lower molded body 2 (the mounting portion 6).

Thus, in the present embodiment, the intake device 1
To a lower molded body 2 having an air cleaner bottom case 3, a collector bottom case 4, and manifold lower divided bodies 5A and 5B.
, Air cleaner opening case 9, collector upper case 1
0, the upper molded body 8 having the manifold upper divided bodies 11A and 11B, and the air cleaner upper case 13 and the like. Therefore, when assembling the intake device 1, first, the lower molded body 2 and the upper molded body 8 are joined to each other. Then, the air cleaner 14, the collector 15, and the manifolds 16A and 16B can be easily formed integrally only by attaching the air cleaner upper case 13 to the upper side of the air cleaner opening case 9.

When the intake device 1 is installed in the engine room, the duct 21, the throttle device 24 and the like are assembled to the lower molded body 2 and the upper molded body 8, and then each mounting portion 6 of the lower molded body 2 is attached. The air cleaner 14, collector 1
5 and the manifolds 16A and 16B can be attached to the engine body side at the same time, and the assembling work and the attaching work of the intake device 1 can be performed efficiently.

Further, since each manifold 16A is formed integrally with the air cleaner 14 while passing through the inflow chamber 18 of the air cleaner 14, gaps and the like between the manifolds 16A, which tend to be useless spaces, are formed. The air cleaner 14 and the manifold 16A can be formed compactly, and the size of the intake device 1 can be reduced reliably in the height direction.

Thus, for example, when the intake device 1 is used for a horizontally opposed engine or the like, the manifold 16
The air cleaner 14 can be easily laid out in the engine room even if the air cleaners A and 16B extend in a relatively wide range in the left and right directions in the engine room.

On the other hand, the air cleaner 14 can be stably supported by the manifolds 16A and 16B mounted on the engine body side, and there is no need to mount the air cleaner in the engine room with a mounting bracket or the like as in the prior art. The number of parts can be reduced.

Since the filter 17 is detachably provided between the air cleaner opening case 9 and the air cleaner upper case 13, the filter 1 is attached and detached to and from the air cleaner opening case 9.
7 can be easily replaced, and maintainability can be improved.

Further, since the outflow chamber 19 in the upper case 13 of the air cleaner is connected to the collector 15 via the duct 21, the throttle device 24 and the like, the flow path of the intake air from the air cleaner 14 to the manifolds 16A and 16B is established. The throttle device 24 can be easily formed in a relatively narrow space, the throttle device 24 can be easily assembled to the intake device 1, and the intake device 1 can be reduced in size and the assembly efficiency can be improved.

Further, the manifold lower divided body 5A, 5B
Are provided with injection valve mounting holes 5A1 and 5B1 at the tip end, and a support portion 6B for supply piping is provided at each mounting portion 6, so that after the intake device 1 is mounted on the engine body side, the injection valve and
A supply pipe for supplying fuel to the injection valve and the like can be easily attached to the engine body side.

Further, the lower molded body 2 and the upper molded body 8 are formed of a resin material or the like, and these are integrally joined via the flange portions 7 and 12 by means such as vibration welding. The lower molded body 2 and the upper molded body 8 having complicated shapes can be easily fixed over the entire circumference.

Next, FIGS. 5 and 6 show a second embodiment according to the present invention.
This embodiment is characterized in that the collector is provided in the air cleaner. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 31 denotes an intake device for an engine according to the present embodiment. The intake device 31 is substantially the same as the intake device 1 of the first embodiment, and includes a lower molded body 32, an upper molded body 36, It is composed of an air cleaner upper case 40 and the like. However, in the present embodiment, a collector 42 described later is used.
Are disposed in the air cleaner 41.

Reference numeral 32 denotes a lower molded body formed of a resin material or the like together with the upper molded body 36.
As shown in FIG. 6, an air cleaner bottom case 33, a collector bottom case 34, and, for example, four manifold lower divided bodies 35 extending from the collector bottom case 34 in the left and right directions in FIG. I have.

Here, the collector bottom case 34 is disposed in the air cleaner bottom case 33, and each manifold lower divided body 35 is integrated with the side surface of the air cleaner bottom case 33 while passing through the air cleaner bottom case 33. Is formed.

Reference numeral 36 denotes an upper molded body joined to the lower molded body 32. The upper molded body 36 is formed integrally with an air cleaner opening case 37, a collector upper case 38, and four manifold upper divided bodies 39. I have. The upper collector case 38 is disposed inside the air cleaner opening case 37, and each manifold upper division body 39 is formed integrally with the side surface portion of the air cleaner opening case 37 while passing through the inside of the air cleaner opening case 37.

A substantially cylindrical throttle mounting portion 38A for connecting the throttle device 24 is formed on a side surface of the collector upper case 38. The throttle mounting portion 38A
Project from the air cleaner opening case 37 to the outside.

Reference numeral 40 denotes an upper air cleaner case detachably mounted on the air cleaner opening case 37. As shown in FIG. 6, a connection port 40A for a duct 45 described later is formed in the upper air cleaner case 40. .

Here, the air cleaner upper case 40 constitutes an air cleaner 41 together with the air cleaner bottom case 33 and the air cleaner opening case 37 in substantially the same manner as in the first embodiment. Together, they constitute the collector 42. Also,
Each manifold lower divided body 35 constitutes each manifold 43 together with each manifold upper divided body 39.
Further, a filter 44 is provided in the air cleaner 41.

A duct 45 connects the air cleaner 41 to the collector 42. One end of the duct 45 is connected to a connection port 40A of the upper air cleaner case 40 via a mounting band 46, and communicates with the outflow side of the air cleaner 41. doing. The other end of the duct 45 is bent in a substantially U-shape, and is connected to the throttle device 24 using bolts 47.

Thus, in the present embodiment configured as described above, substantially the same operation and effect as those of the first embodiment can be obtained, and the air cleaner 41, the collector 42,
Each manifold 43 and the like can be formed compactly, and the size of the intake device 31 can be reduced.

In this embodiment, in particular, the heat from the engine body can be prevented from being transmitted to the collector 42, the manifolds 43, etc. by the air cleaner 41, so that these can be efficiently cooled and the engine performance can be improved. Can be done. Also, for example, the outside air introduction pipe 2
0 can be arranged on the right side of the duct 45 and can be bent rightward and extended, so that the degree of freedom of layout can be increased.

Incidentally, as in a modification of the second embodiment shown in FIG. 7, a substantially L-shaped duct passage 40B 'is integrally formed in an upper air cleaner case 40' of an intake device 31 ', and a duct 45 is formed. The configuration may be omitted.

In this case, the duct passage 40
B 'is opened downward, and the throttle mounting portion 38A' of the collector upper case 38 'is formed in an approximately L-shape which is opened upward, and between the duct passage 40B' and the throttle mounting portion 38A '. And the throttle device 24 is connected in the vertical direction.

As a result, the number of parts and the number of assembling steps related to the duct 45 can be reduced, and the intake device 31 'can be made more compact in the left-right direction in FIG.

In each of the above embodiments, the outside air introduction pipe 20 is formed separately from the air cleaners 14 and 41. However, the present invention is not limited to this.
It is divided below and formed integrally with the air cleaner opening cases 9 and 37 and the air cleaner bottom cases 3 and 33, respectively. When the lower molded bodies 2 and 32 and the upper molded bodies 8 and 36 are joined, the outside air introduction pipe 20 is simultaneously connected. It may be configured to be formed.

In each of the above embodiments, the valve body 24B of the throttle device 24 is opened and closed according to the operation amount of the accelerator pedal. However, the present invention is not limited to this.
The throttle device 24 may be configured as an electronically controlled throttle device that electrically detects the operation amount of the accelerator pedal and drives the valve body 24B by a motor or the like.

Further, in each of the above-described embodiments, the fuel injection valve is mounted on the injection valve mounting holes 5A1, 5B1 of the lower manifold divided parts 5A, 5B, 35, etc.
A, 16B and 43 are configured to inject fuel into
The present invention is not limited to this, and the manifold lower divided body 5A,
The injection valve mounting holes 5A1, 5B1 etc. of 5B, 35 are omitted,
For example, a configuration may be adopted in which fuel is directly injected into each cylinder of the engine.

Further, in each of the above embodiments, the lower molded bodies 2 and 32 are disposed on the lower side in
By arranging the upper side 36, the intake devices 1, 31,
31 ', the intake devices 1, 31, 31' formed by integrating the lower molded bodies 2, 32 and the upper molded bodies 8, 36 are integrated with the internal combustion engine. It may be arranged so as to have an arbitrary positional relationship with respect to the upper and lower directions or the left and right directions.
The arrangement of 1, 31 'is not limited.

In each of the above embodiments, for example, the lower molded bodies 2 and 3 are formed by using means such as vibration welding and high frequency welding.
Although the second flange portion 6 and the like and the flange portion 12 and the like of the upper molded bodies 8 and 36 are joined, the present invention is not limited to this. For example, the two may be joined by means such as adhesion.

In each of the above embodiments, the case where the intake devices 1, 31, 31 'are used in a horizontally opposed four-cylinder engine has been described as an example. However, the present invention is not limited to this.
It may be applied to a parallel cylinder type or V type engine, etc.
The present invention may be applied to a two-cylinder, three-cylinder, or five-cylinder or more engine.

Further, in each of the above embodiments, the case where the air intake devices 1, 31, 31 'are used for an engine for a vehicle has been described as an example. However, the present invention is not limited to this. The present invention may be applied to an internal combustion engine such as an industrial machine.

[0085]

As described in detail above, according to the first aspect of the present invention, since the lower molded body, the upper molded body and the upper case of the air cleaner are constituted, the air cleaner, the collector and the manifold of the intake device can be easily integrated. Can be formed. And, for example, by performing the work of mounting the intake device to the lower molded body, the work of mounting the air cleaner, the collector and the manifold can be performed simultaneously, greatly improving the workability when assembling and mounting the suction device. Can be done. Further, by integrally forming the air cleaner, the collector and the manifold, these can be formed compactly, and the number of parts can be reduced and the layout can be improved.

According to the second aspect of the present invention, the lower manifold divided body is formed integrally with the air cleaner bottom case while passing through the inside of the air cleaner bottom case, and the manifold upper divided body is similarly configured. The space around the manifold can be effectively used as a space for the air cleaner, and the air cleaner and the manifold can be formed compactly. And, for example, the air cleaner can be supported by the manifold attached to the main body side of the internal combustion engine, and the mounting bracket and the like for the air cleaner can be omitted, so that the number of parts of the intake device, the man-hour of the mounting operation, etc. can be reliably reduced. it can.

According to the third aspect of the present invention, the manifold lower divided body extends in a different direction from the collector bottom case, and one of the lower divided bodies is integrated with the air cleaner bottom case while passing through the inside of the air cleaner bottom case. While forming
Since the manifold upper split body is configured in the same manner, the air cleaner can be easily laid out and the air cleaner and the manifold can be formed compactly, for example, even when the manifold is extended in a relatively wide range corresponding to the specification of the internal combustion engine. be able to.

Further, according to the fourth aspect of the present invention,
The manifold lower divided body was formed integrally with the air cleaner bottom case while passing through the air cleaner bottom case from the collector bottom case disposed in the air cleaner bottom case, and the collector upper case and the manifold upper divided body were similarly configured. Therefore, the air cleaner, the collector, and the manifold can be formed compactly. And
The transfer of heat from the internal combustion engine to the collector, the manifold, and the like can be blocked by the air cleaner, and these can be efficiently cooled and the engine performance can be improved.

According to the fifth aspect of the present invention,
Since the upper molded body is provided with a throttle mounting portion for mounting the throttle device, the throttle device can be easily assembled to the intake device, and the intake device including the throttle device can be reduced in size and the assembly efficiency can be improved. Can be planned.

According to the sixth aspect of the present invention, a filter is removably provided between the air cleaner opening case and the air cleaner upper case.
Since it is configured to be connected to the collector upper case via the duct and the throttle device, the filter can be easily replaced by attaching and detaching the air cleaner upper case to and from the air cleaner opening case, thereby improving maintainability. In addition, since the outflow side of the air cleaner and the collector can be connected by a duct and a throttle device, the flow path of the intake air from the air cleaner to the manifold can be easily formed in a narrow space, so that the intake device can be reduced in size and the assembly efficiency can be improved. Can be planned.

Further, according to the invention described in claim 7,
Since the manifold lower split body is provided with a mounting portion for the main body side of the internal combustion engine and an injection valve mounting hole,
The work of mounting the air cleaner, the collector and the manifold can be performed efficiently at the same time, the air cleaner can be stably supported by the manifold, and the number of parts of the intake device can be reliably reduced. Further, after the intake device is attached to the main body side of the internal combustion engine, it is possible to easily perform the work of attaching the injection valve and the like.

[Brief description of the drawings]

FIG. 1 is a front view showing an intake device for an engine according to a first embodiment.

FIG. 2 is a longitudinal sectional view of the intake device as viewed from the direction of arrows II-II in FIG.

FIG. 3 is a longitudinal sectional view of the intake device as viewed from a direction indicated by arrows III-III in FIG. 1;

FIG. 4 is an exploded view showing a state before the intake device is assembled.

FIG. 5 is a front view showing an intake device for an engine according to a second embodiment.

FIG. 6 is a longitudinal sectional view of the intake device as viewed from a direction indicated by an arrow VI-VI in FIG. 5;

FIG. 7 is a longitudinal sectional view similar to FIG. 6, showing a modification of the second embodiment.

[Explanation of symbols]

 1, 31, 31 'Intake device 2, 32 Lower molded body 3, 33 Air cleaner bottom case 4, 34 Collector bottom case 5A, 5B, 35 Manifold lower divided body 5A1, 5B1 Injection valve mounting hole 6 Mounting part 8, 36 Upper part Molded body 9,37 Air cleaner opening case 10,38,38 'Collector upper case 10A, 38A, 38A' Throttle mounting part 11A, 11B, 39 Manifold upper divided body 13,40,40 'Air cleaner upper case 17,44 Filter 21, 45 Duct 24 Throttle device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Munehiro Kudo 1370 Onna, Atsugi-shi, Kanagawa Prefecture

Claims (7)

[Claims] A lower molded body integrally formed with an air cleaner bottom case having an upper side opened, a collector bottom case, and a plurality of manifold lower divisions extending from the collector bottom case; and a lower molded body joined to an opening side of the air cleaner bottom case. An upper molded body integrally formed with an air cleaner opening case, a collector upper case joined to an upper side of the collector bottom case, and a plurality of manifold upper divided bodies joined to an upper side of each of the manifold lower divided bodies; An air intake device for an internal combustion engine, comprising: an air cleaner upper case detachably attached to an upper side of the opening case and covering the air cleaner opening case. 2. The manifold lower divided body provided on the lower molded body is integrally formed with the air cleaner bottom case while passing through an air cleaner bottom case, and the manifold upper divided body provided on the upper molded body is: 2. The intake device for an internal combustion engine according to claim 1, wherein the intake device is formed integrally with the air cleaner opening case while passing through the air cleaner opening case. 3. The manifold lower divided body provided on the lower molded body is provided so as to extend in a different direction from the collector bottom case, and the manifold lower divided body extending to one side is passed through the air cleaner bottom case. The manifold upper split body formed integrally with the air cleaner bottom case and provided in the upper molded body is provided so as to extend in a different direction from the collector upper case, and the manifold upper split body extending to one side has passed through the air cleaner opening case. The intake device for an internal combustion engine according to claim 1, wherein the intake device is formed integrally with the air cleaner opening case in a state. 4. A collector bottom case is provided in the air cleaner bottom case, and a manifold lower divided body provided in the lower molded body is connected to the air cleaner bottom case while passing through the air cleaner bottom case from the collector bottom case. The collector upper case is disposed in the air cleaner opening case, and the manifold upper split body provided in the lower molded body is integrally formed with the air cleaner opening case while passing through the air cleaner opening case from the collector upper case. The intake device for an internal combustion engine according to claim 1, wherein 5. The intake device for an internal combustion engine according to claim 1, wherein the upper molded body is provided with a throttle mounting portion for mounting a throttle device. 6. An air cleaner opening case, wherein a filter is removably provided between the air cleaner upper case and the air cleaner upper case, and the air cleaner upper case is provided via a duct and a throttle device provided on the upper molded body. 4. A structure for connecting to the upper case of the collector.
5. The intake device for an internal combustion engine according to 3 or 4. 7. A front end side of the manifold lower divided body is provided with a mounting portion for mounting the lower molded body on the main body side of the internal combustion engine, and an injection valve mounting hole for mounting a fuel injection valve. An intake device for an internal combustion engine according to claim 1, 2, 3, 4, 5, or 6.